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Molded Concrete Center Mine WallProposed semiautomatic system forms concrete-foam wall along middle of coal-mine passage. Wall helps support roof and divides passage into two conduits needed for ventilation of coal face. Mobile mold and concrete-foam generator form sections of wall in place.
Document ID
19870000151
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Lewis, E. V.
(Caltech)
Date Acquired
August 13, 2013
Publication Date
March 1, 1987
Publication Information
Publication: NASA Tech Briefs
Volume: 11
Issue: 3
ISSN: 0145-319X
Subject Category
Fabrication Technology
Report/Patent Number
NPO-16195
Accession Number
87B10151
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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